TM   9-2320-273-20 COOLING   SYSTEM. 4-52.   WATER   MANIFOLD   MAINTENANCE   (Continued). LOCATION/lTEM ACTION REMARKS A.   REMOVAL   (Continued). 2.   Transfer   tube   (9). a. Remove capscrew (1). b.  Remove  tube  (9). 3.  Deaeration  line  (4)  heater Remove  from  front  mani- hose (2), air compressor fold   (10). line (7), and hose (8). 4.  Four  capscrews  (25) Unscrew and remove and washers (26). thermostat  housing  (6). 5.   Rear   manifold   (32), a. Unscrew and remove Examine  O-rings  and  seal- two  O-rings  (29),  coupling capscrews and washers. (30), two sealing rings (28), ing rings as you remove b.  Remove  rear  manifold them.  Leaks  may  sometimes four  capscrews  (12),and and  coupling. be repaired by replacing washers  (11). c.  Throw  away  sealing broken or damaged rings. rings and O-rings. 6.   Cencer   manifold   (31), a. Unscrew and remove Examine  O-rings  and  seal- coupling  (30),  two  O-rings capscrews and washers. (29), sealing rings (28), ing rings as you remove b.  Remove  center  manifold them. Leaks may sometimes four  capscrews  (12),and and  coupling, be repaired by replacing washers (11). c.  Throw  away  O-rings broken or damaged rings. and  sealing  rings. 7.   Front   manifold   (10), a. Unscrew and remove Examine sealing rings as gasket (27), two sealing capscrews and washers. you  remove  them.  Leaks (18),  four  capscrews  (12), b.  Remove  front  manifold. may sometimes be repaired and washers (11). c. Throw away gasket and by  replacing  broken  or sealing  rings. damaged  rings. 8.  Hose  nipple  (17)  and Unscrew and remove. connector    (16). 9.  Two  capscrews  (13),  two Unscrew and remove. capscrews (15), and four washers (14). 10.  Two  capscrews  (20)  and Unscrew and remove Discard gasket (19)and (24). capscrews (22). water  transfer  connection (18),  gasket  (19),  bracket (21),  water  inlet  connection (23), and gasket (24). 4-208